What is the impact of Stop Routing

Elastic Orchestration Elastic Cloud Enterprise (ECE)
1

What is the impact of the Stop Routing button in ECE on
a) Shards being actively written to? Specifically, will a new shard be created on another node to takeover new traffic?
b) Ability to query the old data on that shard.

Or will this simply kick the cluster into a yellow state and Elastic will start to flip Replicas to primaries and make new replicas? Which would be similar to the Shard Allocation Filtering feature of ElasticSearch

2

What "stop routing" does it not allow the proxy to route external traffic to that node. It doesn't change any internal routing/shard allocation/etc

It's normally used in an "all or nothing" way, so it doesn't actually make much sense for it to be settable on a per-node basis, that's just a quirk of the implementation

Alex